Abrading tool



AU 323 EX FIP8109 March 9, 1948. H. PALMER ABRADING TOOL Filed May 22,1946 LEVI H. PALMER Patented Mar. 9, 1948 UNITED STATES PATENT OFFICEABRADING TOOL Levi Hester Palmer, Childersburg, Ala.

Application May 22, 1946, Serial No. 671,475

8 Claims. (Cl. 51-194) This invention relates to improvements inabrading tools, and in particular to an abrading or sanding roll of thetype in which a sheet of abrasive material is secured about theperiphery of a rotary cylindrical body or roll by securing means mountedinternally thereof. While not limited thereto, the sanding roll of thepresent invention has special utility in the manufacture and/orrebuilding of shoes, for example, in sanding the shank of the shoe afterplacing on a new sole, in subsequent buffing and polishing operations,and the like.

A principal object of the invention is the provision of an abrasive orsanding roll characterized by improved and durable construction, andwhich is thoroughly dependable in use, Another object of the inventionis the provision of a sanding roll of the type in which a sheet ofabrasive material is secured about the periphery of a cylindrical bodymember, and which incorporates improved means for clamping the ends ofthe abrasive sheet, and for tightening the sheet to the degree desiredby the operator or required for a particular sanding, bufiing, polishingor like operation, and which also permits ready replacement of a wornabrasive sheet or substitution of one type of sheet for another.

Other objects will be in part obvious and in part hereinafter pointedout in connection with the following analysis of this invention whereinis illustrated in detail a preferred embodiment of the invention.

In the drawings- Fig. 1 is a side elevational view of a sanding rollaccording to the invention, shown as secured in a hub drivinglyconnected with a powered shaft or spindle;

Fig. 2 is an end view of the sanding roll shown in Fig. 1;

Figs. 3 and 4 are views turned 90 one from the other, illustrating theimproved sheet clamping means according to the invention;

Figs. 5 and 6 are detail views illustrating the two-part construction ofthe improved clamping means; and

Figs. 7 and 8 are section views taken on lines 1-! and 88, respectively,of Fig. 3.

Referring to the drawings, wherein like reference characters designatelike parts throughout the several views, reference character l0designates a rotary cylinder, one end thereof bein formed solid andterminating in a reduced diameter, axial stem II which is screw-threadedinto an end bore of a hub l2, the latter being formed with a. socketadapted to receive a power-driven 2 shaft I3. through which latter thetool is powerdriven. Suitable means are provided to afiix the hub l2 tothe shaft l3, for example a set screw l4.

The other end or working end of the cylinder is longitudinally bored,the bore ll thereof (Fig, 2) being offset slightly from the axis of thecylinder, so that the arcuate wall defining the tubular end thereof isthinner in one portion of its arcuate length than in its oppositeportion. The cylinder bore Il extends approximately three-quarters thelength of the cylinder and terminates in a small diameter bore extensionIla, the purpose of which is to center the sheet clamping pin to bedescribed within the cylinder bore ll.

As seen in Figs. 1 and 2, the tubular or sleevelike end of the cylinderis provided with a longitudinally extending slot [8, through which theends of an abrasive sheet l9 disposed about the periphery thereof extendinto the bore ll wherein they are secured. Preferably, the slot [8 iscut through the thinner side or portion of the tubular wall of thecylinder, whereby the working end of the cylinder has a limited degreeof yield.

According to the invention, the sheet clamping means takes the form of aclamp pin of two-part construction as shown in Figs. 3 and 4, the pinparts being hereinafter referred to as the main and complemental pinparts. The main pin part generally designated 22 is formed with a fullcircular mounting end 22a of diameter slightly less than that of thecylinder bore I1, and with a half-round clamping end 22b having a flatclamping face 220 extending the length thereof. The half-end wall orface 22d at the juncture of the mounting and clamping ends of thepin-part is inclined as shown, and similarly the end face of thehalf-round clamping end is inclined as at 22s, it being observed thatthe inclination of the faces 22d and 22e is approximately the same. Saidinclined faces function as wedging surfaces as will appear hereinafter.

In its mounting end, the main pin-part is provided with 'a circulargroove 22) in which the shank end of a set screw 24 is adapted toprolect. By reference to Fig. 1, the set screw is threaded into thesleeve end of the cylinder, its head seating'in a counter-sink providedin the periphery thereof. The set screw is adapted not only to projectinto the groove 22 for the purpose of holding the pin-part 22 within andagainst axial separation from the cylinder, but

also, upon tightening thereof, to engage against the groove bottom,thereby to secure the pin-part in any angular position to which it hasbeen adiusted. The full circular mounting end 22a of 3 the pinterminates in a reduced diameter stem 229 (which may be threaded) andwhich is adapted to extend into the reduced-diameter end Ila of thecylinder bore I1, thereby to center the pin in the bore.

As best seen in Figs. 4 and 8, the full circular end of the pin isprovided with a narrow-width slot 22h which extends rearwardly from theinclined end face 22d thereof and opens through said face for a portionof the length of the latter, as generally shown in Fig. 6. An angledtongue 22k projects outwardly from the inclined end face He or thehalf-round clamping end 22b of the pin-part, as shown in Figs. 3, 4 and7.

The eomplemental pin-part generally designated 23 as shown comprises ahalf-round clamping end 2311 having a fiat clamping face 231) andterminating at one end in an inclined end face 230, and its other endbeing formed as a full circular head 23d kerfed to provide an inclinedface 23c. The inclination of the faces 23c, 23c of the pin part 23 isopposite to that of the faces 22d, 22c of the pin-part 22, whereby, asseen in Fig. 3, the inclined faces 22d, 23c and 22e, 23c function uponassembly of the pin-parts to full formation as wedging surfaces whichtend to bring the parts together as the pin-part 23 is moved endwise tomate with the pin-part 22.

The full circular head end 23d of the complemental pin-part is providedwith a cross slot 23 (Figs. 2 and 4) adapted to receive the blade of aturning tool, for example, a screw driver. The cross slot is alsoadapted to receive the angled tongue 2210 of the pin part 22 in finalassembly. At its opposite end the complemental pin-part is provided witha longitudinal tongue 23g which projects from the inclined end face 23cthereof, and is adapted to extend into the slot 2271. provided in thefull-circular end of the pin-part 22 in assembly. The tongues 22k and239 function as keys and, in conjunction with the inclined end faces ofthe parts, insure that turning motion applied to the pin-part 23 by ascrew driver or like too] is transmitted to the pin-part 22 as well.

To secure an abrasive sheet in the cylinder lo, the main pin-part 22 isdisposed within the bore l1 thereof and initially secured against axialseparation by turning the set screw 24 an amount suflicient to projectits shank end into the circular groove 22; of the part. The sheet ofabrasive is then wrapped about the periphery of the cylinder and itsends passed through the cylinder slot I8. For such operation, it will beassumed that the pin-part 22 has been rotated to an angular positionsuch that the ends of the sheet being secured may enter the cylinderbore l1 and be disposed generally parallel to the fiat clamping face 22cof the pin-part. With the ends of the sheet arranged as aforesaid, thecomplemental pin-part 23 is now inserted axially into the bore, beingpositioned so as to clamp the ends of the sheet between its clampingface 23b and the clamping face 220 of the pin-part 22. As thecomplemental pin-part mates with the main pin-part, it will be observedthat the inclined end faces of both are axially efiective so that theaxial insertion of the pin-part 23 tends to wedge or cam the partstogether, whereby the ends of the sheet are secured with a force whichincreases with the amount of inserting force applied to the pin-part 23.Mating of the pin-parts also results in tongue 2270 of pin-part 22seating in the head slot 23f or pin-part 23 and similarly in tongue 23gof the pin-part 23 passing into the slot 22h of pin-part 22, with theresult that the pin-parts are keyed to each other for rotation inunison.

With the sheet ends now clamped between the clamping faces of the pinparts, the pin assembly may now be turned about its axis by insertingthe blade of a screw-driver, for example, into the head slot 23f of pinpart 23. This turning movement, although applied directly to thecomplemental pin-part 23, is transmitted to the main pin-part 22 by theinclined face and the key and slot connection of the pin-parts asdescribed. The applied turning movement acts to draw the ends of theabrasive sheet further into the cylinder bore, thus insuring that theportion of the sheet disposed about the periphery of the cylinder isdrawn taut as well as tensioned to the degree suiting the operatorsdesires or to the requirements of the particular work. Upon the sheetbeing sufficiently tensioned, screw 24 is tightened, thereby to securethe two pin-parts to the cylinder in their angular position ofadjustment to which they have been turned.

It will be observed that the two-part clamping pin assembly as describedprovides a simple yet thoroughly dependable means for securing the endsof an abrasive sheet about a rotary cylinder or roll. The freeremovability of one pin-part from the cylinder bore is of particularadvantage in permitting easy insertion of the sheet ends when it isdesired to apply the sheet to the roll, to replace a worn sheet, or tosubstitute one type of sheet for another. Moreover, the two-partconstruction of the holding pin permits the tightening of the abrasivesheet on the roll or cylinder, as may be required, in simple yeteffective manner.

While an abrasive or sanding roll according to the invention isparticularly useful in sanding the shank of high-heel shoes afterplacing on a new sole, it may also be employed in subsequent buffing andpolishing operations, and for these latter operations, sheets of buffingand polishing material are substituted for the emery cloth used insanding. Rolls incorporating the special sheet clamping means hereindisclosed may of course be made up in any of the sizes required for thevariety of operations for which it is useful.

With the sanding roll as described may be supplied a collar 30 as shownin Fig. 1, which is adapted to be slipped over the operating end of theroll after the abrasive sheet is secured, and thereupon fastened indesired adjusted position on the roll by a holding screw 3 I. The collarmay serve as a guide or stop when the roll is used to sand around theedges of a thin halfsole of a womans shoe, particularly when the sole iscemented on and is of such thinness that it cannot be trimmed with theusual trimmer generally employed for this purpose.

As many changes could be made in carrying out the above constructionwithout departing from the scope of the invention. it is intended thatall matter contained in the foregoing description or shown in theaccompanying drawings shall be interpreted as illustrative and not in alimiting sense.

I claim:

1. An abrading roll of the character set forth. comprising an elongatedcylindrical member having a solid driving end, the other end of themember being tubular and having a longitudinal slot in its tubular wall,a sheet of abrasive material disposed about the periphery of the tubularend of the member with its ends passing through the slot, and clampingmeans contained in said tubular end and being operative to secure theends of the abrasive sheet comprising a part mounted for rotationrelative to but being normally secured against axial separation fromsaid member, and a second part mounted to rotate in unison with saidfirst part but being axially separable therefrom and removable from themember.

2. An abrasive roll as set forth in claim 1. wherein the said parts havecoacting provisions whereby rotary motion applied to the second part istransmitted to the first part.

3. An abrading roll of the character set forth, comprising an elongatedcylindrical member having a solid driving end, the other end of themember being tubular and having a longitudinal slot in its tubular wall,a sheet of abrasive material disposed about the periphery of the tubularend of the member with its ends passing through the slot, and clampingmeans contained in said tubular end and being operative to secure theends of the abrasive sheet comprising a two-part clamping pin, of whichone part is mounted for rotation relative to but is normally securedagainst axial separation from the member, and the other pin-part isadapted to rotate in unison with said first part but is axiallyseparable therefrom and from said member.

4. An abrading roll of the character set forth, comprising an elongatedcylindrical member having a solid driving end, the other end of themember being tubular and having a longitudinal slot in its tubular wall,a sheet of abrasive material disposed about the periphery of the tubular end of said member with its ends passing through the slot, and atwo-part clamping pin disposed in said tubular end and being adapted toreceive between the parts thereof the ends of the abrasive sheets, thepin-parts being provided with coacting axially eflective wedgingsurfaces whereby in axial assembly of the pin parts, the ends of theabrasive sheet are clamped therebetween.

5. An abrading roll as set forth in claim 4, wherein one of the clampingpin-parts is secured against axial separation from said member.

6. An abrading roll as set forth in claim 4, wherein one of the clampingpin-parts is secured against axial separation from said member, andwherein both said clamping pin-parts are provided with mutually coactingmeans whereby rotary motion applied to the other pinpart is transmittedto said one pin-part.

7. An abrading roll of the character set forth,

comprising an elongated cylindrical member, one end of the member beingtubular and having a longitudinal slot in its tubular wall, a sheet ofabrasive material disposed about the periphery of the tubular end ofsaid member with its ends passing through the slot, and a two-partclamping pin adapted for axial assembly and being operative to receivebetween the parts thereof the ends of the abrasive sheets, the pin-partsbeing provided with coacting axially effective wedging surfaces wherebyin the axial assembly of the pin-parts the ends of the abrasive sheetare clamped therebetween, and with mutually coating tongue and slotconnections whereby rotary motion applied to one of the pin-parts istransmitted to the other pin-part.

8. An abrading roll of the character set forth, comprising an elongatedcylindrical member, one end of the member being tubular and having alongitudinal slot in its tubular wall, a sheet of abrasive materialdisposed about the periphery of the tubular end of said member with itsends passing through the slot, and a two-part clamping pin adapted toreceive between the parts thereof the ends of the abrasive sheets, onepinpart being secured in and against axial separation from said memberand including a full circular mounting end and a half-round clamping endhaving a flat clamping face, the other pin part being freely separablefrom said member and including a half-round clamping end having a flatclamping face and a head provided with a tool-receiving slot, said pinparts be ing provided with coacting wedging surfaces functioning towedge the parts together in assembly thereof whereby to clamp the endsof the sheet disposed between their clamping faces, and with mutuallycoacting pin and slot connections providing for transmission of rotarymotion applied to said other pin-part to said one pin-part.

LEVI HESTER PALMER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 505,683 Stubbe Sept, 26, 18931,326,836 Bendix et a1 Dec. 30, 1919 1,374,052 Brauner et a1. Apr. 5,1921 1,631,798 Davol June 7, 1927

